The 3D Petri Dish® cast from this precision micro-mold has 256 circular recesses (16 x 16 array) and is used to self-assemble 3D microtissues in the shape of a spheroid. The nominal dimensions of one of these recesses when formed in the 3D Petri Dish® are; diameter: 300μm and depth: 800μm. The single large cell seeding chamber above these 256 recesses holds a volume of 190μl. This 3D Petri Dish® fits into a standard 12 well tissue culture plate. (6 micro-molds per pack)